Mercurial > hg > nginx
annotate src/core/ngx_hunk.h @ 155:46eb23d9471d
nginx-0.0.1-2003-10-22-20:38:26 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 22 Oct 2003 16:38:26 +0000 |
parents | eac26585476e |
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rev | line source |
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1 #ifndef _NGX_HUNK_H_INCLUDED_ |
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2 #define _NGX_HUNK_H_INCLUDED_ |
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4 |
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5 #include <ngx_config.h> |
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6 #include <ngx_core.h> |
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9 /* hunk type */ |
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11 /* the hunk is in memory */ |
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12 #define NGX_HUNK_IN_MEMORY 0x0001 |
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13 /* the hunk's content can be changed */ |
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14 #define NGX_HUNK_TEMP 0x0002 |
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15 /* the hunk's content is in cache and can not be changed */ |
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16 #define NGX_HUNK_MEMORY 0x0004 |
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17 /* the hunk's content is mmap()ed and can not be changed */ |
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18 #define NGX_HUNK_MMAP 0x0008 |
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20 #define NGX_HUNK_RECYCLED 0x0010 |
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21 |
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22 /* the hunk is in file */ |
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23 #define NGX_HUNK_FILE 0x0100 |
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25 #define NGX_HUNK_STORAGE (NGX_HUNK_IN_MEMORY \ |
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26 |NGX_HUNK_TEMP|NGX_HUNK_MEMORY|NGX_HUNK_MMAP \ |
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27 |NGX_HUNK_RECYCLED|NGX_HUNK_FILE) |
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29 /* hunk flags */ |
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31 /* in thread state flush means to write the hunk completely before return */ |
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32 /* in event state flush means to start to write the hunk */ |
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33 #define NGX_HUNK_FLUSH 0x1000 |
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34 /* last hunk */ |
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35 #define NGX_HUNK_LAST 0x2000 |
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36 #define NGX_HUNK_LAST_SHADOW 0x4000 |
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37 #define NGX_HUNK_TEMP_FILE 0x8000 |
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40 typedef void * ngx_hunk_tag_t; |
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42 typedef struct ngx_hunk_s ngx_hunk_t; |
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44 struct ngx_hunk_s { |
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45 char *pos; |
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46 char *last; |
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47 off_t file_pos; |
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48 off_t file_last; |
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50 int type; |
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51 char *start; /* start of hunk */ |
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52 char *end; /* end of hunk */ |
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53 char *pre_start; /* start of pre-allocated hunk */ |
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54 char *post_end; /* end of post-allocated hunk */ |
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55 ngx_hunk_tag_t tag; |
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56 ngx_file_t *file; |
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57 ngx_hunk_t *shadow; |
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58 /* STUB */ int num; |
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59 }; |
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62 typedef struct ngx_chain_s ngx_chain_t; |
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64 struct ngx_chain_s { |
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65 ngx_hunk_t *hunk; |
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66 ngx_chain_t *next; |
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67 }; |
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70 typedef struct { |
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71 int num; |
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72 ssize_t size; |
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73 } ngx_bufs_t; |
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76 #define NGX_CHAIN_ERROR (ngx_chain_t *) NGX_ERROR |
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79 #define ngx_hunk_in_memory_only(h) \ |
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80 ((h->type & (NGX_HUNK_IN_MEMORY|NGX_HUNK_FILE)) == NGX_HUNK_IN_MEMORY) |
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81 /* |
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82 ((h->type & (NGX_HUNK_TEMP|NGX_HUNK_MEMORY|NGX_HUNK_MMAP|NGX_HUNK_FILE)) \ |
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83 == (h->type & (NGX_HUNK_TEMP|NGX_HUNK_MEMORY|NGX_HUNK_MMAP))) |
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84 |
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85 */ |
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86 |
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87 #define ngx_hunk_special(h) \ |
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88 (h->type == (h->type & (NGX_HUNK_FLUSH|NGX_HUNK_LAST))) |
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89 |
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91 #define ngx_hunk_size(h) \ |
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92 ((h->type & NGX_HUNK_IN_MEMORY) ? h->last - h->pos: \ |
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93 (size_t) (h->file_last - h->file_pos)) |
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94 |
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96 ngx_hunk_t *ngx_create_temp_hunk(ngx_pool_t *pool, int size, |
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97 int before, int after); |
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99 #define ngx_alloc_hunk(pool) ngx_palloc(pool, sizeof(ngx_hunk_t)) |
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100 #define ngx_calloc_hunk(pool) ngx_pcalloc(pool, sizeof(ngx_hunk_t)) |
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101 |
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102 |
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103 #define ngx_alloc_chain_link(pool) ngx_palloc(pool, sizeof(ngx_chain_t)) |
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104 |
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105 |
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106 #define ngx_alloc_link_and_set_hunk(chain, h, pool, error) \ |
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107 do { \ |
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108 ngx_test_null(chain, ngx_alloc_chain_link(pool), error); \ |
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109 chain->hunk = h; \ |
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110 chain->next = NULL; \ |
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111 } while (0); |
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112 |
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113 |
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114 #define ngx_chain_add_link(chain, last, cl) \ |
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115 if (chain) { \ |
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116 *last = cl; \ |
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117 } else { \ |
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118 chain = cl; \ |
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119 } \ |
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120 last = &cl->next |
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121 |
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122 |
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123 int ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, ngx_chain_t *in); |
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124 void ngx_chain_update_chains(ngx_chain_t **free, ngx_chain_t **busy, |
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125 ngx_chain_t **out, ngx_hunk_tag_t tag); |
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126 |
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127 |
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128 #endif /* _NGX_HUNK_H_INCLUDED_ */ |